Disable EISA and probes

Greg KH greg at kroah.com
Sat Sep 5 02:15:14 EDT 2020

On Fri, Sep 04, 2020 at 10:57:38PM -0400, Jeffrey Walton wrote:
> Hi Everyone,
> I would like to disable EISA and its probes during boot. I found the
> docs at https://www.kernel.org/doc/html/latest/driver-api/eisa.html,
> but it does not discuss how to disable EISA or the probes.
> I also found https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1543919,
> where folks are wondering why EISA is enabled by default nowadays. And
> one person asks about a kernel option to disable it (like I am doing).
> I'd like to add a boot param like eisa=0 or eisa=off, but I suspect
> it's not that easy. Looking at the three documented kernel parameters,
> they all enable EISA and probes.
> How do I disable EISA and the probes?

Build a kernel without EISA in it at all?  That's the simplest way as
you must have some custom hardware that doesn't like this, so a
custom-configuration seems like the best option.

Did you try that and it did not work?  What is the problem of EISA at
boot anyway?


greg k-h

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